vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
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<strong>vSphere</strong> <strong>Storage</strong><br />
Multiple Network Adapters in iSCSI Configuration<br />
If your host has more than one physical network adapter for software and dependent hardware iSCSI, use the<br />
adapters for multipathing.<br />
You can connect the software iSCSI adapter with any physical NICs available on your host. The dependent<br />
iSCSI adapters must be connected only to their own physical NICs.<br />
NOTE Physical NICs must be on the same subnet as the iSCSI storage system they connect to.<br />
Figure 11-1. Networking with iSCSI<br />
Two physical NICs connected to<br />
the software iSCSI adapter<br />
Host1<br />
Host1<br />
software iSCSI adapter dependent hardware iSCSI adapters<br />
vmhba# vmhba33 vmhba34<br />
virtual<br />
vmk1 vmk2 vmk1<br />
adapters<br />
vSwitch<br />
vmnic1 vmnic2 vmnic1 vmnic2<br />
physical NICs<br />
IP network<br />
Two physical NICs with iSCSI<br />
offload capabilities<br />
vSwitch<br />
physical NICs<br />
with iSCSI<br />
offload<br />
capabilities<br />
vmk2<br />
Host2<br />
Host2<br />
iSCSI storage iSCSI storage<br />
virtual<br />
physical<br />
The iSCSI adapter and physical NIC connect through a virtual VMkernel adapter, also called virtual network<br />
adapter or VMkernel port. You create a VMkernel adapter (vmk) on a <strong>vSphere</strong> switch (vSwitch) using 1:1<br />
mapping between each virtual and physical network adapter.<br />
One way to achieve the 1:1 mapping when you have multiple NICs, is to designate a separate <strong>vSphere</strong> switch<br />
for each virtual-to-physical adapter pair. The following examples show configurations that use <strong>vSphere</strong><br />
standard switches, but you can use distributed switches as well. For more information about <strong>vSphere</strong><br />
distributed switches, see the <strong>vSphere</strong> Networking documentation.<br />
88 <strong>VMware</strong>, Inc.
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